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ADS54J60: Spur of Fs/4 Frequency Appeared

Part Number: ADS54J60
Other Parts Discussed in Thread: WAVEVISION5,

Dear TI Team:

Hi.

The spur of Fs/4 frequency appeared when we use the ADS54J60. When there's no signal input, a spur of 250MHz can be seen on the 1st NQZ of about -82dBFS where the sampling rate is 1GSPS via WaveVision5.

This fixed-frequency spur affects the post processing result of the system, so we wonder if the phenomenon is normal, or whether there is a way to solve the problem or not.

Looking forward to your answer and thank you!